Sirus Black

Full Name: Sirius Black
Nicknames: Snuffles and Padfoot.
Birthday: Unknown, is guessed to be born either 1958 or 1959.
Died: 1996 (killed by Bellatrix Lestrange in HP & OotP)
Parents: Walburga and Orion.
Siblings: Regulus (Also known as R.A.B – the one who found one of Voldemorts horcruxes, the slytherin locket.)
Other Relatives: Narcissa Malfoy, Andromeda Tonks, Bellatrix Lestrange (who later killed Sirius), Arthur Weasley (second cousin, once removed)…
Pet: He did take care of Buckbeak for a while. But otherwise – unkown.
Appearance: Sirius Black was good looking, though the 12 years in Azkaban made him skinnier and almost unrecognizable. His eyes were sunken at the time, and his face looked very skull like. (PoA, Chapter 19) His eyes are the color of grey and fathomless (PoA, Chapter 19) His hair color is black.
Blood status: Pureblood

At Hogwarts:
Wand: Unknown

Other facts:

Sirius Black created the Marauder’s Map with James Potter, Remus Lupin and Peter Pettegrew.

Sirius Black is also an Animagus (unregistered), and can turn into an oversized black dog.

At the age of 16, Sirius ran away from home to live with the Potters.

The Black’s family motto is Toujours pur (“always pure”).

It is unkown if Bellatrix really killed Sirius since he fell through a veil. We don’t know if he died before he fell or after.